KR19980083895A - Optical sensing vehicle headlight failure detection device and method - Google Patents

Abstract

The present invention relates to a photo-sensing vehicle headlight failure detection device and method for detecting a light emitted when a headlight of a vehicle is turned on and informing a driver of a state in which the headlight is not turned on due to a failure such as disconnection or short circuit of the headlight. . The apparatus of the present invention for this purpose is installed in close proximity to the headlight and the light sensing sensor means for outputting a predetermined signal according to the lighting light when the headlight is turned on, the on / off signal of the switch to turn on the headlight and the light A control means for receiving an output signal of a sensing sensor means and outputting a predetermined signal according to the case where the headlight is not turned on when the switch is turned on, and being turned on / turned off according to the output signal of the control means And switching means and fault indication means which are operated at turn-on of the switching means to indicate a failure state of the headlights. The method of the present invention includes a switch for turning on and off the headlights of the vehicle. A first step of determining whether the headlight switch is turned on in the first step and light is emitted from the headlight. Is a second step of detecting whether and when the lighting light of the headlight is not detected in the second step, performing a headlight failure indication, and a third step of maintaining the normal operation state of the headlight when the lighting light is detected. It is characterized by. As such, the present invention provides the advantage of improving the convenience of the motor vehicle.

Description

Optical sensing vehicle headlight failure detection device and method

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting a failure of an automobile headlight and a method thereof, and more particularly, to detect a state in which a headlight is not turned on due to a cause such as disconnection or short circuit of the headlight by detecting light emitted when the automobile headlight is turned on. An automobile headlight failure detecting apparatus and a method thereof are provided.

Generally, headlights are lamps that illuminate the front so that the vehicle can be safely driven at night. In this lamp, two filaments are usually installed. In other words, one of the two filaments installed in the headlamp is a high beam for illuminating the distant place, and a lower beam for weakening the brightness and lowering the beam. The headlamp further includes a lens and a reflector in addition to the two filaments. The circuit configuration for turning on and off such headlights is schematically shown in FIG. 1.

Referring to FIG. 1, one end of the headlight 20 is grounded, the other end thereof is connected to one end of the headlight switch 10 provided in the combination switch via a fuse F, and the other end of the headlight switch 10 is a battery. Connected to (B). When the headlight switch 10 is turned on in such a state, the headlight 20 is supplied with the battery B power so that the headlight 20 is turned on.

By the way, when the headlight 20 is turned on as described above, there is a problem that the driver cannot easily identify whether the headlight 20 is turned on in the vehicle. For example, when all the headlights installed on both sides of the front of the vehicle are disconnected or short-circuited and the headlight 20 is not lit, the driver can easily know whether the headlight is broken, but any one of the headlights is disconnected or shorted. If it does not turn on, the driver has to come out of the car in the state that the headlight switch is turned on (ON) there is an inconvenience that needs to check whether the headlights are lit directly.

In addition, when a failure occurs in any one of the headlights when driving at night, when the driver does not turn on, there is a problem that the driver cannot confirm whether the failure is not enough to secure the front field of view.

The present invention was created in order to solve the above problems, the light-sensing vehicle headlight failure to detect the state that the headlight does not light due to the cause such as disconnection and short circuit of the headlight by detecting the light emitted when the headlight of the vehicle is turned on It is an object of the present invention to provide a detection device and a method thereof.

1 is a circuit diagram for driving a general automotive headlight,

Figure 2 is a block diagram showing an apparatus for detecting a failure of the headlight of the photosensitive vehicle according to the present invention,

3 is a flowchart of a method for detecting a failure of a photoelectric vehicle headlight according to the present invention;

Explanation of symbols for main parts of the drawings

1 photo-sensing unit 2 AND gate

3: light emitting lamp 4: buzzer

5: transistor 10: headlight switch

11: phototransistor 12: inverter

20: headlight

In order to achieve the above object, a photosensitive automotive headlight failure detecting device according to the present invention,

In the photosensitive automotive headlight failure detection device for detecting a state in which the headlight does not light due to a failure such as disconnection or short circuit of the vehicle headlight,

A light sensing sensor means installed near to the headlight and outputting a predetermined signal according to the lit light when the headlight is turned on, an on / off signal of a switch to turn on the headlight, and an output signal of the light sensing sensor means Control means for outputting a predetermined signal when the headlamp is not turned on while the switch is turned on, switching means for turning on / off in accordance with an output signal of the control means, and It is characterized in that it comprises a fault display means which is operated at turn-on to indicate a fault condition of the headlamp.

In a preferred embodiment of the present invention, the photosensitive sensor means,

When the headlamp is turned on to emit light, the phototransistor is turned on by the light to output a high signal, and other than that, a phototransistor for outputting a low signal while maintaining a turn-off state, and connected in series with a rear end of the phototransistor And an inverter for inverting and outputting a predetermined input signal.

In a preferred embodiment of the present invention, the control means outputs a high signal when receiving an on signal from the headlight switch and a high signal from the light sensing sensor means, and a low signal when receiving other signals. An AND gate for outputting a (LOW) signal, wherein the switching means is a transistor, and the fault indicating means is a light emitting lamp (or LED) or a buzzer.

The photosensitive automotive headlight failure detection method achieved by the photosensitive automotive headlight failure detection device of the present invention,

In the photosensitive automotive headlight failure detection method for detecting a state in which the headlight does not light due to a failure such as disconnection or short circuit of the vehicle headlight,

A first step of judging whether a switch for turning on or off the headlight of the vehicle is on; a second step of detecting whether a headlight is generated when the headlight switch is turned on in the first step; and the second step If the lighting light of the headlight is not detected in the step, the headlight failure display is performed, and if the lighting light is detected, the third step of maintaining the normal operation state of the headlight is characterized in that it comprises a.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the photosensitive automotive headlight failure detection apparatus and method according to the present invention. For the sake of convenience, the same reference numerals are used for constituent members that have the same function as those used in the prior art.

The photo-sensing vehicle headlight failure detecting device according to the present invention detects the light emitted when the vehicle headlight is turned on and detects a state in which the headlight does not turn on due to a failure such as disconnection and short circuit of the headlight, and is illustrated in FIG. 2. As shown, it is installed in front of the headlight 20 and connected to the phototransistor 11 and the collector of the phototransistor 11 that are turned on by the lit light when the headlight 20 is turned on and output a high signal. And an on / off signal of the light detecting sensor unit 1 including the inverter 12 for inverting and outputting the output signal of the phototransistor 11 and the headlight switch 10 for turning on the headlamp 20. When the headlight 20 is not turned on while the headlight switch 10 is turned on while the headlight switch 10 is turned on, the AND signal outputs a predetermined signal, for example, a high signal. 2, the switching transistor 5 which is turned on or off according to the output signal of the AND gate 2, and the switching transistor 5 is operated when the switching transistor 5 is turned on to indicate a failure state of the headlamp 20. It comprises a failure display unit consisting of a light emitting lamp (or LED) 3 and a buzzer 4 to display. Here, the phototransistor 11 of the photosensitive sensor unit 1 is turned on by the light when the headlight 20 is turned on to emit light, the lighting is usually turned on and the headlight 20 is broken If it does not emit light, it will remain turned off. Therefore, when the headlamp 20 is turned on, the inverter 12 of the photosensitive sensor unit 1 outputs a low signal, and when the headlamp 20 is not turned on, a high signal is output.

The AND gate 2 outputs a high signal when the ON signal is input from the headlight switch 10 and the high signal is received from the photosensitive sensor unit 1, and when the signal other than the above signal is input. Outputs a LOW signal.

In addition, in the present invention, the fault display unit may include both the light emitting lamp 3 (or the LED) and the buzzer 4, or any one of them may be selectively provided. Is preferably installed on an instrument panel (not shown) of the vehicle. Reference numerals R1 and R2 denote voltage distribution resistors for inputting a high signal to the AND gate 2 when the headlight switch 10 is turned on, and R3 and R4 denote voltages of the inverter 12 of the photosensitive sensor unit 1. When a high signal is output, it is a voltage divider resistor for inputting a high signal to the AND gate 2, and F is a fuse. Here, one end of the phototransistor 1 is connected to the ignition power source IG such that the operation of the fault display of the present invention is preferably operated only in an ignition state.

The operation of the photosensitive automotive headlight failure detecting device according to the present invention configured as described above will be described with reference to FIG. 3.

First, referring to FIG. 3, for example, when the driver turns on the headlight switch 10 during night driving, the battery B power is applied to the headlight 20 in the same manner as in the prior art, and the headlight 20 is turned on. When the headlamp 20 is turned on, the headlight 20 emits lit light. When the light according to the lighting of the headlamp 20 is emitted as described above, the port transistor 11 installed on the front of the headlamp 20 is preferably turned on by the emission light of the headlamp 20, and thus the inverter ( 12) outputs a low signal. When the headlamp 20 is turned on and the phototransistor 11 is turned on, the ON signal of the headlamp switch 10 and the low signal of the inverter 12 are applied to the AND gate 2, and a low signal is output from the output terminal. do. When the low signal is output from the AND gate 2, since the switching transistor 5 is turned off, the lamp 3 and the buzzer 4 do not operate. That is, when the headlamp 20 is normally turned on, the fault display unit made up of the display lamp 3 and the buzzer 4 of the present invention does not operate.

However, if the headlight switch 10 is turned on and a high signal is inputted to one input terminal of the AND gate 2, a failure occurs in the headlight 20 and no lit light is generated. Since the inverter 11 is turned off, the inverter 12 inputs a high signal to the AND gate 2. When the high signal is input to both input terminals of the AND gate 2 as described above, the high signal is output from the output terminal. When the AND gate 2 outputs a high signal, the transistor 5 is turned on to drive the lamp 3 and the buzzer 4. That is, when a failure occurs in the headlight 20 and is not turned on, a failure display part including the display lamp 3 and the buzzer 4 of the present invention operates to cause a failure such as a disconnection or a short circuit in the headlight 20. Notifies the driver that the headlight 20 is not lit.

Thus, the present invention detects the light emitted when the headlights are turned on, detects the presence or failure of the headlights such as disconnection and short circuit, and informs the driver that the headlights are not turned on so that maintenance of the headlights can be timely performed. .

As described above, the method of the present invention achieved by the apparatus for detecting vehicle headlight failures according to the present invention, as illustrated in FIG. 3, indicates that the switch 10 for turning on the headlight 20 of the vehicle is turned on. Determining the step (S10), and if the headlight switch 10 is turned on in step S10 (S20) for detecting whether the lighting light is emitted from the headlight 20 (S20), and the lighting light of the headlight 20 in step S20 is predetermined If it is not detected by the photosensitive sensor member of the phototransistor 11, for example, failure indication of the headlamps through the failure display member such as the lamp 3 and the buzzer 4, and by the photosensitive sensor member If the lighting light is detected, it comprises a step (S30) of maintaining the normal operating state of the headlamp (20).

The operation of the photosensitive headlight failure detection method of the present invention configured as described above will be described with reference to FIGS. 2 and 3.

First, if the driver detects whether the headlight switch 10 is turned on (S10), and if the headlight switch 10 is turned on in step S10, the light sensor according to the lighting of the headlight 20 emits a light sensor such as a phototransistor 11. Detects through (S20). When the lighting light of the headlamp 20 is detected by the phototransistor 11, the lighting state of the headlamp 20 is maintained. If the lighting light of the headlamp 20 is not detected, the lamp 3 and the buzzer 4 are detected. Indicates the fault condition of the headlight. Thus, the method of the present invention detects the light emitted when the headlights are turned on, detects the presence or failure of the headlights such as disconnection and short circuit, and informs the driver so that maintenance of the headlights can be timely performed.

As described above, the apparatus for detecting a vehicle headlight failure according to the present invention and a method thereof detect a light emitted when a vehicle headlight is turned on, detect a failure such as disconnection and short circuit of the headlight, and notify the driver of the headlight. It provides the effect of ensuring maintenance is done in a timely manner. In addition, the present invention provides an advantage of improving the convenience of the vehicle because it is easy to know the presence or absence of the headlight in the vehicle interior.

On the other hand, the above-described light-sensing vehicle headlight failure detection apparatus and method of the present invention are not limited to the above embodiments and can be carried out by applying many manufacturing modifications without departing from the spirit and scope of the present invention.

Claims (8)

In the photosensitive automotive headlight failure detection device for detecting a state in which the headlight does not light due to a failure such as disconnection or short circuit of the vehicle headlight, A light sensing sensor means installed near to the headlight and outputting a predetermined signal according to the lit light when the headlight is turned on, an on / off signal of a switch to turn on the headlight, and an output signal of the light sensing sensor means Control means for outputting a predetermined signal when the headlamp is not turned on while the switch is turned on, switching means for turning on / off in accordance with an output signal of the control means, and Light-sensing vehicle headlight failure detection device, characterized in that it comprises a failure display means which is operated at turn-on to display a failure state of the headlight. The method of claim 1, wherein the light sensor means, When the headlamp is turned on to emit light, the phototransistor is turned on by the light to output a high signal, and other than that, a phototransistor for outputting a low signal while maintaining a turn-off state, and connected in series with a rear end of the phototransistor And an inverter for inverting and outputting a predetermined input signal. According to claim 1 or claim 2, wherein the control means outputs a high signal when the on signal of the headlight switch and the high signal of the light sensing sensor means outputs a high signal, when receiving a signal other than the low signal A photosensitive automotive headlight failure detection device comprising an AND gate for outputting. The apparatus of claim 1, wherein the switching means is a transistor. The apparatus of claim 1, wherein the fault indicating means is a light emitting lamp. The apparatus of claim 1, wherein the fault indicating means is an LED. The apparatus of claim 1, wherein the fault indicating means is a buzzer. In the photosensitive automotive headlight failure detection method for detecting a state in which the headlight does not light due to a failure such as disconnection or short circuit of the vehicle headlight, A first step of judging whether a switch for turning on or off the headlight of the vehicle is on; a second step of detecting whether a headlight is generated when the headlight switch is turned on in the first step; and the second step And detecting a headlight failure indication when the lighting light of the headlight is not detected in the step, and maintaining the normal operation state of the headlight when the lighting light is detected.